The Sky will be hyrdoformed steel like the Solstice.
Unfortunately (in my opinion) Saturn is moving away from the polymer body panels. The Ion is due to be updated within a year or so, and when it receives that update production is rumored to be moving to the Lordstown OH plant that makes the other cars on that platform (Cobalt, HHR). It will be steel too (if the rumor is true that it is moving to Lordstown assembly). This news was in the Detroit News about a day or two ago, or it was a linked article in the Detroit News Auto Insider website. I tried a quick search and didn't come up with it.
That would leave just the Vue as a polymer vehicle, and the only one built in Spring Hill.
Unfortunately (in my opinion) Saturn is moving away from the polymer body panels. The Ion is due to be updated within a year or so, and when it receives that update production is rumored to be moving to the Lordstown OH plant that makes the other cars on that platform (Cobalt, HHR). It will be steel too (if the rumor is true that it is moving to Lordstown assembly). This news was in the Detroit News about a day or two ago, or it was a linked article in the Detroit News Auto Insider website. I tried a quick search and didn't come up with it.
That would leave just the Vue as a polymer vehicle, and the only one built in Spring Hill.